Question

A runner accelerates from rest with an
acceleration of 4 m/s squared for 2.3s. What will
her speed be at the end of this time?​

Answer 1

Explanation:

initial acceleration =0m/s2

so velocity =0 m/s

s =ut+1/2atsquare

s =0+2×(2.3)square

s=10.58

speed =10.58/2.3 =4.6